Furnace construction



Dec. 21 1926.

F. J. ZIPPLER FURNACE CONSTRUCTION Filed Sept. 50, 1925 F11 z/PPLERMENTOR ATTORNEY Patented Dec. 21, 1926.

UNITED. STATES 1,611,704 PATENT OFFICE.- j

FRANCIS .r. ZIPPLER, or PIVITTSBURGVH, PENNSYLVANIA.

FUnNhoE coNsrauc'rIoN.

Application tiled. September This invention relates to furnaces, and

v metal in the furnace and consequent stoppage thereof. Furtherobjects'will appear from the detail description. a

In the drawings v Figure 1 is a vertical sectional view through thelower portion of a furnace constructed in accordance withv myinventiontaken substantially on line '11 of Figure 2.

Figure 2 is a section taken substantially on line 2-2 of Figure l.

Figure 3is a perspective view of one of the supporting blocks.

Figure l is a perspective view of one of the twyer blocks. Y

Fi re 5 is a fragmentary shctional view. showing a modified form ofconstruction.

Figure 6 is a modified sectional view show-- ing another modified formof construction.

The furnace A is of known construction and includes a sheathing B whichsurrounds the refractory material C. The furnace is provided with a necka which communicates with a throat d discharging into a metal receivinchamber 6 in thelower portion f of the rnaee. Furnaces of this type areof well known construction and it is not thought necessary to furtherdescribe in .detail the construction of the furnace itself.

A flat cast iron rin" 1 seats upon the upper face of lower portion f ofthe furnace an is provided with an upwardly projecting rib 2 remote fromits inner edge. support ing blocks 3 seat upon plate 1', each of theseblocks being provlded in its lower inner corner with a rabbet 4 whichreceives rib 2.

The block 3 is of approximately T-shape to hold the supporting blocks inposition,

and against movement inwardly of ring 1.

of the air before it enters the fur:

30,1925. Serial No. 59,611.

Due to the T-s'hape of blocks 3, an air receiving' space 6'is formedabout the furnace in the p ane of the blocks. Blocks 3 are spaced'apartso as to leave openings 7 for entrance of the air into the furnace, airbeing supplied to space 6 through openin s 8 provided for this purposein sheathing fi, these openings communicating with an air chest ormanifold 9 which extends about the furnace and to which air is suppliedby means of conduits 10 connected to any suitable or preferred means forsupplying air under pressure to the chest.

- An upper ring 11 is supported upon blocks 3 and is provided with aninner depending flange 12 which is spaced away from the innor faces ofblocks 3 and extends downward ly an appreciable distance from the upperends of these blocks forming with the inner faces of the blocks an airpassage 13. The

lower portion of this flange is reduced in of such breadth as to contactwith the inner faces of blocks 3 and extend to the inner edge of plate1, bridging the space between the two plates. The twyer blocks arespaced apart to provide twyer openings 17 for admitting air into thethroat of the furnace. These twyer blocks can be readily adjusted onplate 1 so as to vary the size and relative disposition of the openingsto obtain maximum eficiency in operation of the furnace. By having theblocks positioned on end or vertically, and bridging the space betweenthe two plates, these blocks are readily accessible and can be easilyadjusted as de- 1 sired or necessary.

Flues 18 of known construction commu nicate at their upper ends with thethroat of the furnace above the upper plate. These flues alsocommunicate, at their lower ends, with the air space 6 throu h suitableopenings 11 provided throug up er plate 1 andopenings 3 provided througcertain of the blocks 3 for this purpose, openings 3 registering withopenings 11. supporting blocks and associated parts are heated to a hightemperature during operation of the furnace, the air which enters space6and flows about and between these, blocks will be. heated to a. hightemperature As thebefore entering the air passage 13 where this air-willbe heated to even ahigher temperature before being discharged throughthe twyer openings 17 into the furnace. This insures that the air willbe properly preheated before enterin the furnace and effeetuallyprevents chilling andconsequent freezing of the metal in the furnace.The

admission of this preheated air to the furure 5, ring 1 is. providedwith two upwardly projecting ribs 2" between which is seated a lowersupporting block 3" upon which is seated a center ring 2". An uppersupporting block 3 is seated on ring 2* and sup- -ports an upper ring11" having a depending flange 11. The twyer blocks 16 are supported uponthe inner portion of lower ring 1 each of these blocks being providedwith r a projection 15 extending from its upper inner-corner in front ofplate 2*, a space 19 being left between the upper end of blocks 16* andthe under face of plate 2*. Plate 2 may be continuous or can be formedof spaced segments, as desired. The air flowingbetween blocks 3 can passinto the space 13 between flange 11 and blocks 3 so as to be heated,this heated air commingling with the air flowing into space 6 andpassing between blocks 3". The air which flows between blocks 3 passesthrough the spaces between the twyer blocks, some of this air flowingdiregtly into the furnace and the restof this air flowing through space19 into the spaces between the twyer blocks and thence into the furnace.The lower supporting blocks 3* are preferably provided at their outerupper edges with upwardly rojecting flanges 3 which serve to hold t ecentral plate 2* in osition.

In the modified form illustrated in Figure 6 the central late 2 isprovided with an outer upward y projecting peripheral flange 2 whichacts to hold the upper supporting blocks 3 against outward-movement, andthe depending flange 120i the upper plate 11 and projection 15 of twyerblock" 16" is rabbeted to receive the redneedlower, portion of flange 12of-upper plate'11; The

' inner portion 2 of plate 2 is reduced in thickness to provide a space19 between the upper ends of the twyer blocks and the plate. Theoperation of this modified form is in all essentlal respects the same asthe operation of the form illustrated in Figure 5.

As will be understood, and as herernabove suggested, changes may beresorted to in the construction and arra'n ement of parts of theinvention without" spar-ting from the tion, a lower rin --blocks, theflange of the upper ring i J field and scope of thegsame, and I intendto include all 'such variations, as fall within the scope of theappended claims, in this application in which a preferred form only ofmy invention is disclosed. 4

- "What r claim is 1. In a furnace construction, a lower portion, alower ring seated on said lower portion, supporting blocksseated on thering in spaced relation, means for supplying air under pressure to thespaces between the blocks, an upper ring seated upon the blocks andhaving a depending flange spaced away from the inner faces ofthe blocks,and twyer blocks seated on the lower ring and extending therefrom to theflange of the upper ring, said twyer blocks being spaced apart toprovide twyer openings and being inde-- pendently adjustable upon thelower ring to vary the size and relative disposition of the twyeropenings, the upper port-ion of the furnace resting upon said upperring. I

2. In a furnace construction, a lower portion, a lower ring seated onsaid lower portion, supporting blocks seated on the ring inspacedrelation and provided with outwardly projecting flanges at theirlower ends, said blocks being of approximate T- shape, a sheathingforming with the blocks an air space extending a structure, an upperring seated on the blocks and having a depending flange cooperating withthe upper portions of the block to form an air passage, means forsupplying air unout the furnace der pressure to said air space, andtwyeri blocks mounted on the lower ring inside of the supporting blocksand in spaced relation, said twyer blocks extending from the lower ringto said flange and being independently adjustable upon the ring to varythe size and relative disposition of the twyer v openings, the upperportion of the furnace resting upon the upper ring. 3. In a furnaceconstruct'on, a lower porseated-on said lower portion, supporting spacedrelation and provided with outwardly projecting flanges at their lowerends, said blocks being of approximate T-shape, a

sheathing forming with the blocks an air space extending about thefurnace structure, an upper ring seated on the blocks and having adepending flange cooperating with the upper portions of the block toforman air passage, means for supplying air under pressure to said airspace, the lower ring extending inwardly beyond the supporiling avingits lowerportion reduced in thickness from its inner\ face, and aplurality oftwyer blocks supported upon the inner portion of the lowerring and independently adjustable thereon, said twyer blockscorresponding in width to the width of the inner portion of the lowerring and being of less height than locks seated on the ring in thesupporting blocks, the twyer blocks bei ing provided at. the inner edgesof their upper ends with extensions projecting into the lower reducedportion of the flange of the upper ring, the upper portion of thefurnace resting upon said upper ring.

4. In afurnace construction, a lower portion, a lower ring seated onsaid lower 'por-\ tion, supporting blocks seated upon the lower ring inspaced relation, means for supplying air under pressure to the spacesbetween said blocks, an upper ring seated upon the supporting blocks andhaving a depending flange' spaced away from the inner faces of theblocks, the upper portion-of the furnace resting upon said upper ring,the lower ring extending inwardly beyond the supporting blocks, andtwyer blocks supported upon the inner portionof the lower ring andextending therefrom to the flange of the upper ring, said twyer blocksbeing spaced apart and independently ad justable on the lower'ring.

5. In a furnace construction, a lower portion, a lower ring'seated onsaid lower portion, supporting blocks seated upon the lower ring inspaced relation and the blocks and the ring being provided withcooperating means for preventing movement. of the blocks inwardly of thering, means for' supporting-blocks, and twyer blocks supportednpon theinner portion of the lower ring and extending therefrom to the flange ofthe upper ring, said twyer blocks-being spaced apart and independentlyadjustable on the lower ring. v

'6. In a furnace construction including a sheathing, a lower portion, alower ring seated on said lower portion, supporting blocks mounted onthe'ring in spaced relationand spaced away from the sheathing,

means for supplying air under pressure to the space between said blocksand the sheathing, the ring extending inwardly beyond the blocks, anupper rin seated on the blocks and coacting therewith to form an innerair space communicating with the spaces between the blocks, the upperportion of the furnace resting upon the upper plate, and

twyer blocks mounted upon the inner por tion of thelower ring in spacedrelation and bridging the space between the two rings, said twyer blocksbeing independently.

adjustable to vary the size and relative disposition of the spaces.therebetweem 7. In a' furnace construction includinga sheathing, alower portion, a lower ring seated on said lower portion, sup ortingblocks mounted on the rlng in spac relation and spaced away from thesheathing, means for supplying air under pressure to the space A betweensaid blocks and the sheathing, the

ring extending inwardly beyond the blocks, an upper ring seated on theblocks and coacting therewith'to form an inner air space communicatingwiththe spaces between the blocks, the upper portion of the furnaceresting upon the upper plate, twyer blocks mounted upon the innerportion of the lower ring in spaced. relation and bridging the space,between the two rings, Said twyer blocks apeing independently adjustableto vary the size and relative disposition 9f the spaces therebetween,and fines comunicating with the interior of the furnace above the'npperring, the upper ring and the supporting blocks having openingsestablishing communication between-said fluesv and the space between theS a ng and said su portingblocks. p

, In testimony whereof I- aflix my signature.

FRANCIS J. ZIPPLER.v

